CN203185622U - Compound mold for producing construction plastic formwork by coextrusion method - Google Patents
Compound mold for producing construction plastic formwork by coextrusion method Download PDFInfo
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- CN203185622U CN203185622U CN2013200324459U CN201320032445U CN203185622U CN 203185622 U CN203185622 U CN 203185622U CN 2013200324459 U CN2013200324459 U CN 2013200324459U CN 201320032445 U CN201320032445 U CN 201320032445U CN 203185622 U CN203185622 U CN 203185622U
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Abstract
The utility model discloses a compound mold for producing a construction plastic formwork by a coextrusion method, which comprises a shell, wherein the front end and back end of the shell are respectively provided with a mold hole inlet and a mold hole outlet; the lateral surface of the middle part of the shell is provided with a surface layer plastic feed port; the mold hole inlet is communicated with an outlet of an inner layer foamed plastic extruder; the surface layer plastic feed port is communicated with a surface layer plastic extruder; the upper part or side wall of the shell is provided with an electric heater; and a coextrusion mold is installed in the inner cavity of the shell corresponding to the surface layer plastic feed port. The utility model can enhance the surface strength of the product, and has the advantages of high surface smoothness, high strength, low damage tendency, strong alkali corrosion resistance and much longer service life. By using the compound mold, the surface layer plastic can uniformly converge from the chute to the center and generate pressure, and the pressure intensity is equivalent to the inner layer proceeding speed; and thus, the utility model also has the advantages of favorable use effect and high work efficiency.
Description
Technical field
The utility model relates to template production technology in a kind of building field, is specifically related to the composite die that a kind of coextruding method is produced building plastic formwork.
Background technology
At present; the plastic formwork that in building field, adopts; cure process must be done in its surface; otherwise because corroding because of concrete strong basicity on template its surface when concrete is combined; cause the template degradation even scrap; the surperficial cure process mode of existing building template is fairly simple, is with the template direct water-cooling of outlet behind the mould but or oil cooling, makes the template surface formation layer protective layer that hardens rapidly.Facts have proved that protective layer can improve template surface fineness, played to a certain extent anticorrosive and not with the effect of the easy demoulding of concrete bonding.Yet the protective layer intensity of existing template surface is not high, still can be corroded by alkaline matter.And existing template protection layer thickness is lower, is generally 20 thickness, because concrete has alkalescence, under normal operating position, the protective layer of template surface can be corroded gradually, finally causes the coarse easily sticking ash of template surface, and template is shorter service life.
At present, there are a large amount of waste PVC plastic products in China, does not also have good method to be recycled, and so not only causes a large amount of wastes of these waste PVC plastic products resources, but also causes a large amount of white pollutions.China is conventional in building field construction, and what use is in the majority with plank sheathing, and the bamboo offset plate is arranged simultaneously, and steel form is also deposited.Shortcomings such as plank sheathing has easy suction, comes unglued, and is out of shape, and the number of turnover is few are badly in need of substituting traditional mould material with a kind of New Type Architecture Mode, could save the timber resources of China's preciousness like this.
In building field, can improve intensity and the corrosion resistance of plastic formwork by composite shuttering, composite shuttering has the common advantage of unlike material.Existing composite shuttering is generally plastic steel composite structure, or moulds wooden composite construction, perhaps the plastics composite construction of two or more varying strength performances, yet, existing composite shuttering is adopted the fixing composite shuttering that forms in the method for paste mostly, and this complex method has intensity difference, defective easy to crack.Paste or the heat seal mode exist only in adhesive surface in conjunction with dynamics, stickup face can wear out gradually, causes composite shuttering shorter service life.
The utility model content
The purpose of this utility model is poor at plastic building template ubiquity surface strength in the prior art, and the problem that is corroded easily provides a kind of coextruding method to produce the composite die of building plastic formwork.
The utility model is achieved through the following technical solutions: a kind of coextruding method is produced the composite die of building plastic formwork, comprise shell, the front end of shell is provided with the die hole import, the rear end of shell is provided with the die hole outlet, middle housing side from the die hole import to die hole the outlet is provided with the top layer plastic feed, described die hole import is communicated with internal layer foamed plastic outlet of extruder, described top layer plastic feed is communicated with the top layer plastic extruder, is provided with electric heater unit in shell upper or sidewall simultaneously; In the shell inner cavity corresponding with the top layer plastic feed co-extruding mould is installed, the middle part of this co-extruding mould is provided with the composite bed shaping channel, the width of the shaping channel of die hole import department is less than the width of composite bed shaping channel, be provided with the top layer plastics at the front end face of co-extruding mould and hoard the chamber, the outward flange that these top layer plastics are hoarded the chamber is provided with chute, and the upper and lower end of chute is respectively arranged with the discharging opening that the top layer plastics can be flowed into chute; Middle part or the trailing flank of co-extruding mould are provided with guiding gutter simultaneously, guiding gutter is connected with the outlet of top layer plastic extruder by passage or pipeline, the upper and lower end of guiding gutter is respectively arranged with charging aperture, upper and lower charging aperture respectively with the corresponding connection of described upper and lower discharging opening, make to hoard in the chamber to keep-up pressure.Be provided with the tapering transition face between flow-guiding channel and the composite bed shaping channel.Be provided with the planar annular district around the composite bed shaping channel between tapering transition face and composite bed shaping channel, each plane in planar annular district is vertical with composite bed shaping channel inner surface.
The utlity model has following advantage: the utility model can realize with the waste or used plastics being that primary raw material is as internal layer, add 20% virgin material as skin, by the co-extrusion processing technology, produce a kind of brand-new plastic formwork, cardinal principle is: attach auxiliary agents such as blowing agent with waste or used plastics and pass through extruder, extrude inner sandwich layer (density is about 0.6), extrude jointly in a mould with 20% hard PVC simultaneously the PVC foaming product is carried out entire package, operation by certain technology can combine them completely, produces a kind of brand-new coextruding method plastic formwork.
Pass through the utility model, can guarantee internal layer when blank with outer by pressure and mould shape, both are pressed together, internal layer is in the hot melt state directly and the extrusion modling of outer hot melt state, two-layerly mutually combine and permeate the formation fixed structure, shaped article has thicker skin, usually greater than 50, not only improve surface strength, also improved the intensity of whole template.Composite shuttering after the moulding no longer directly forms surperficial [through the water cooling skinning in mouth mould end but does typing by vacuum setting machine and handle, and globality is better.By the composite shuttering that this method and mould form, the surface smoothness height, the intensity height is difficult for impaired, and alkali resistant corrosivity is strong, and prolong service life greatly.
Adopted co-extruding mould in the composite die of the present utility model, feeding-passage has been adopted in the front and back end of co-extruding mould (or middle part), the end face of co-extrusion is provided with hoards the chamber, and its edge arranges chute and helps top layer plastics the tapering transition face that slides and the planar annular district that keeps extruding allowance.By long-term on probation and repeatedly experiment, determined the structure of reasonable co-extrusion, the top layer plastics converge and produce pressure equably from the chute to the center, and its intensity of pressure is suitable with the internal layer gait of march, and result of use is good, and high efficiency is beneficial to promotion and implementation very much.
Product by the utility model production is pure plastic products, and surface strength and density height do not absorb water.Inner sandwich layer is masterbatch with the waste or used plastics, forms the skeleton support force, the intensity height.It is big to have overcome common foam template fragility, and the surface skining layer is thin, and the number of turnover that the shortcoming (the co-extrusion epidermal area reaches 0.7mm) of the corrosivity resistance difference of mixing clay has been improved greatly template can reach more than 30 times.Product has good toughness, rigidity, and anti-impact force is strong, and is not fragile.
Description of drawings
Fig. 1 is the process chart that adopts the utility model composite die;
Fig. 2 is internal layer and outside coextrusion mold view;
Fig. 3 is (D portion) end view after the moulding;
Fig. 4 is composite die and top layer plastic extruder and internal layer foamed plastic extruder annexation figure;
Fig. 5 is the A-A cross-sectional view of Fig. 4;
Fig. 6 is the B-B cross-sectional view of Fig. 4;
Fig. 7 is the C-C cross-sectional view of Fig. 4.
Among the figure, label 1 is the inner plastic template, and 2 is outside plastic formwork, and 3 is the limit rib, 4 is middle rib, and 5 is internal layer foamed plastic extruder, and 6 is the top layer plastic extruder, and 7 is composite die, 8 is co-extruding mould, and 9 is the inner sandwich layer shaping channel, and 10 is the composite bed shaping channel, 11 is the upper end discharging opening, and 12 is the lower end discharging opening, and 13 is chute, 14 is the tapering transition face, and 15 is the planar annular district, and 16 is the upper end charging aperture, 17 is the lower end charging aperture, and 18 is gathering sill, and 19 is fixing hole.
The specific embodiment
Embodiment 1: referring to Fig. 1～Fig. 7, composite die comprises shell, the front end of shell is provided with the die hole import, the front end of shell is provided with the rear end and is provided with the die hole outlet, middle housing side from the die hole import to die hole the outlet is provided with the top layer plastic feed, described die hole import is communicated with internal layer foamed plastic outlet of extruder, and described top layer plastic feed is communicated with the top layer plastic extruder, is provided with electric heater unit in shell upper or sidewall simultaneously; In the shell inner cavity corresponding with the top layer plastic feed co-extruding mould is installed, the middle part of this co-extruding mould is provided with the composite bed shaping channel, the width of the shaping channel of die hole import department is less than the width of composite bed shaping channel, be provided with the top layer plastics at the front end face of co-extruding mould and hoard the chamber, the outward flange that these top layer plastics are hoarded the chamber is provided with chute, and the upper and lower end of chute is respectively arranged with the discharging opening that the top layer plastics can be flowed into chute; Middle part or the trailing flank of co-extruding mould are provided with guiding gutter simultaneously, guiding gutter is connected with the outlet of top layer plastic extruder by passage or pipeline, the upper and lower end of guiding gutter is respectively arranged with charging aperture, upper and lower charging aperture respectively with the corresponding connection of described upper and lower discharging opening, make to hoard in the chamber to keep-up pressure.Be provided with the tapering transition face between flow-guiding channel and the composite bed shaping channel.Be provided with the planar annular district around the composite bed shaping channel between tapering transition face and composite bed shaping channel, each plane in planar annular district is vertical with composite bed shaping channel inner surface.
Coextruding method is produced building plastic formwork technology and is adopted two sleeving plastic kneaders simultaneously, be respectively top layer kneader and inner sandwich layer kneader, each plastics kneader is respectively by being combined to form two plastic extruder production lines with top layer plastic extruder and internal layer foamed plastic extruder behind the feeder, article two, the plastic extruder production line forms the composite plastic building template by composite die simultaneously, pass through vacuum setting machine, hauling machine and cutting machine then successively, form multilayer composite plastic building template product.Wherein, top layer plastic extruder 6 and internal layer foamed plastic extruder 5 are connected with composite die by orthogonal mode, referring to Fig. 4.
From Fig. 5, Fig. 6 and Fig. 7 as can be seen, composite die 7 comprises inner sandwich layer shaping channel 9 and composite bed shaping channel 10 from front to back successively.The width of inner sandwich layer shaping channel 9 is less than the width of composite bed shaping channel 10, be combined with inner layer material better in order to make the top layer plastics, be provided with the top layer plastics at the front end face of composite bed shaping channel 10 and hoard the chamber, the outward flange that these top layer plastics are hoarded the chamber is provided with chute 13, the upper and lower end of chute 13 is respectively arranged with the discharging opening 11 and 12 that the top layer plastics can be flowed into chute, chute 13 is structures of annular, can make extruding evenly from inwardly extruding all around.The plastic formwork structure difference of moulding as required, the described formwork structure that has limit rib 3 and middle rib 4 of Fig. 3 for example, the central region of limit rib 3 and middle rib 4, and discontinuity or dead angle area can appear in the bigger plane domain in plastic formwork upper surface, take between chute and composite bed shaping channel, to be provided with the method for tapering transition face (outstanding forward), in order to improve the intensity of pressure of position, local dead angle, guarantee that the whole skin power that is squeezed is even.The mode that the top layer plastics are introduced chute is that middle part or the trailing flank at composite bed shaping channel 10 is provided with guiding gutter 18, guiding gutter 18 is connected with 6 outlets of top layer plastic extruder by passage or pipeline, the upper and lower end of guiding gutter 18 is respectively arranged with charging aperture 16 and 17, upper and lower charging 16 and 17 mouthfuls respectively with described upper and lower discharging opening 11 and 12 corresponding connections, make to hoard in the chamber to keep-up pressure.
The problem of top layer plastics maldistribution when preventing extrusion modling, between tapering transition face 14 and composite bed shaping channel 10, be provided with the planar annular district 15 around the composite bed shaping channel, each plane in planar annular district 15 is vertical with composite bed shaping channel inner surface, planar annular district 15 is conducive to hoard enough top layer plastics at the composite bed channel entrance, in case the leak-stopping hole produces.
Claims (4)
1. a coextruding method is produced the composite die of building plastic formwork, comprise shell, the front end of shell is provided with the die hole import, the rear end of shell is provided with the die hole outlet, it is characterized in that: the middle housing side from the die hole import to die hole the outlet is provided with the top layer plastic feed, described die hole import is communicated with internal layer foamed plastic outlet of extruder, and described top layer plastic feed is communicated with the top layer plastic extruder, is provided with electric heater unit in shell upper or sidewall simultaneously; In the shell inner cavity corresponding with the top layer plastic feed co-extruding mould is installed, the middle part of this co-extruding mould is provided with the composite bed shaping channel, the width of the shaping channel of die hole import department is less than the width of composite bed shaping channel, be provided with the top layer plastics at the front end face of co-extruding mould and hoard the chamber, the outward flange that these top layer plastics are hoarded the chamber is provided with chute, and the upper and lower end of chute is respectively arranged with the discharging opening that the top layer plastics can be flowed into chute.
2. composite die according to claim 1, it is characterized in that: middle part or the trailing flank of co-extruding mould are provided with guiding gutter, guiding gutter is connected with the outlet of top layer plastic extruder by passage or pipeline, the upper and lower end of guiding gutter is respectively arranged with charging aperture, upper and lower charging aperture respectively with the corresponding connection of described upper and lower discharging opening, make to hoard in the chamber to keep-up pressure.
3. composite die according to claim 2 is characterized in that: be provided with the tapering transition face between flow-guiding channel and the composite bed shaping channel.
4. composite die according to claim 3, it is characterized in that: be provided with the planar annular district around the composite bed shaping channel between tapering transition face and composite bed shaping channel, each plane in planar annular district is vertical with composite bed shaping channel inner surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200324459U CN203185622U (en) | 2013-01-22 | 2013-01-22 | Compound mold for producing construction plastic formwork by coextrusion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200324459U CN203185622U (en) | 2013-01-22 | 2013-01-22 | Compound mold for producing construction plastic formwork by coextrusion method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203185622U true CN203185622U (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200324459U Expired - Lifetime CN203185622U (en) | 2013-01-22 | 2013-01-22 | Compound mold for producing construction plastic formwork by coextrusion method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103101169A (en) * | 2013-01-22 | 2013-05-15 | 张琪彬 | Process for producing building plastic formwork by co-extrusion method and compound mould |
| CN117052266A (en) * | 2023-08-11 | 2023-11-14 | 江西立立联新型建材有限公司 | Door leaf of plastic-wood co-extrusion type framework and processing method thereof |
-
2013
- 2013-01-22 CN CN2013200324459U patent/CN203185622U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103101169A (en) * | 2013-01-22 | 2013-05-15 | 张琪彬 | Process for producing building plastic formwork by co-extrusion method and compound mould |
| CN103101169B (en) * | 2013-01-22 | 2016-02-24 | 张琪彬 | Coextruding method produces building plastic formwork technique and composite die |
| CN117052266A (en) * | 2023-08-11 | 2023-11-14 | 江西立立联新型建材有限公司 | Door leaf of plastic-wood co-extrusion type framework and processing method thereof |
| CN117052266B (en) * | 2023-08-11 | 2024-01-16 | 江西立立联新型建材有限公司 | Edge covering equipment for door leaf of plastic-wood co-extrusion type framework |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130911 Effective date of abandoning: 20160224 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |